Not necessarily. A fork can be as simple as a copy&paste of the original chain or a complete different story.
With the Steem-Hive saga the reason for the fork was a disagreement with the allocation and intention of the genesis stake, and for that reason the new chain had a different distribution in that sense.
All the supporters of JS have their Steem balances intact, but of course their 'vote/influence' (stake) has been removed from the new mirrored chain. Mirror all the balances 1:1 would have been pointless IMO. You lost nothing as nobody stole anything from you.
Nonetheless, you're welcome to start blogging & interacting here. If you think that your funds we're 'stolen' unfairly you can always make a proposal.
Have a nice day.